Gait belts. Anyone out there using them on lift assists?

I don’t know about you guys but half my job is scooping meemaw off the floor and putting her back in her chair. Usually this entails supporting a decent amount of body weight via armpits and waistbands which is isn’t ideal for me or meemaw. I was talking to a CNA recently who asked me if we carry gait belts on the truck and I had to admit I’d never even heard of that particular device. Anyone out there got a gait belt on your QRV, truck, or med unit? How do you like it? How much training did you need to be able to use it safely and effectively?